It's been a while since I have been able to program again, however I just 
tried this and the alt tab combination is not actually registered by pyglet 
(Windows 7).

On Saturday, December 3, 2016 at 4:46:37 PM UTC-6, magu...@gmail.com wrote:
>
> What you can do is capture the alt-tab keys and use 
> window.set_fullscreen(False) to return to the desktops native resolution, 
> then you could use window.minimize() to miminize it to the task bar or just 
> leave it around. I've tried a few other approaches using 
> window.on_activate() and window.on_deactivate() for when the window gains 
> and looses focus, though I found the results were a little janky when it 
> came to scaling properly, others may be able to get better results. As it 
> stands in my current example when you tab back the window won't be in 
> fullscreen mode, but a simple alt+enter solves that. Example:
>
> import pyglet
> from pyglet.window import key
> from pyglet.gl import *
>
> class example(pyglet.window.Window):
>     def __init__(self):
>         super(example, self).__init__(640, 480, resizable=False, 
> fullscreen=True, caption="Test")
>         self.clear()
>
>     #fullscreen aspect ratio
>         self.aspect = [self.width/640.0,self.height/480.0]
>
>         pyglet.clock.get_fps()
>         self.fps_display = pyglet.clock.ClockDisplay()
>
>         pyglet.clock.schedule_interval(self.update, .01)
>
>
>     def update(self,dt):
>     #draw screen
>         self.draw()
>
>
>     def draw(self):
>         self.clear()
>         self.fps_display.draw()
>       
>
>     def on_key_press(self,symbol,modifiers):
>         if symbol == key.ESCAPE:
>             self.close()
>     #fullscreen toggle
>         if symbol == key.ENTER:
>             if modifiers & key.MOD_ALT:
>             #if fullscreen off, turn on and scale the screen
>                 if self.fullscreen == False:
>                     window.set_fullscreen(True)
>                     
> glScalef(window.width/640.0,window.height/480.0,1.0)#2.25x, 
> 1.875y
>                     self.aspect[0] = window.width/640.0
>                     self.aspect[1] = window.height/480.0
>                     print 'PONG',self.aspect
>             #if its on, turn it off and un-scale the screen
>                 else:
>                     window.set_fullscreen(False)
>                     glScalef((window.width/640.0)/self.aspect[0],(window.
> height/480.0)/self.aspect[1],1.0)
>
>     #tab out of fullsceen
>         if symbol == key.TAB:
>             if modifiers & key.MOD_ALT:
>                 if self.fullscreen == True:
>                     window.set_fullscreen(False)
>                     glScalef((window.width/640.0)/self.aspect[0],(window.
> height/480.0)/self.aspect[1],1.0)
>                     self.minimize()
>
>
> if __name__ == '__main__':
>     window = example()
>     pyglet.app.run()
>
>
>
>

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